High-Energy X-Ray Microprobe System with Submicron Resolution for X-Ray Fluorescence Analysis of Uranium in Biological Specimens

Figure 5

High resolution $\mu$-XRF image of the marked area in Figure 4(d) measured at 37 keV X-rays. (a) The two-dimensional distribution of uranium. The XRF intensities are estimated to the concentration of uranium. Beam size: 1.2 $\mu$m (V) × 1.4 $\mu$m (H), imaging area: 75 $\mu$m (V) × 57 $\mu$m (H), pixel size: 0.5 $\mu$m, and dwell time: 5 s. (b) X-ray fluorescence spectrum at arrow head in Figure 5(a). Measurement time is 600 s.

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